Apparatus for extracting turpentine and other substances from wood.



PATENTED APR. 30, 1907.

M. MQKBNZIE. APPARATUS FOR BXTRAOTING TURPENTINE AND OTHER SUBSTANCES FROM WOOD.

APPLICATION nun 1120.30. 1905.

Inventor: Mal/b0 014. L L I/Vg/ LX M W M At main s'rEs arr-mi Erica.

APPARATUS FOR EXTRACTING T URPEN TINE AND'OTHER SUBSTANCES FROM WOOD.

To all whom it nuty concern:

Be it known that I, MALooLM MoKENzrE, a citizen of the United States, and a resident of Plainfield, in the State of New Jersey, have invented certain new and useful 1m rovements in Apparatus for Extracting rpentine and other Substances from W'ood, of which the following is a specification, reference being bad tothe accompanying drawings, forming a part'hereofl This invention relates to the extraction of turpentine and other substances from wood bymeans of a bath of resin or similar material, in which the wood is subjected to the action of resin ata high temperature, the turpentine and volatile substances which are set free in the bath being conducted from the vessel in which the wood is treated and con densed. x

It hasbeen found that the separation of the volatile substances from thebath of rosinor other'like material is greatly facilitated by the introduction of steam into the bath and it has been proposed to introduce steam for this purpose into the vessel in which the wood is treated. However, the extraction of turpentine and other more or less volatile substances from the wood is most efliciently carried on when the bath is maintained at a relativelyhigh temperature, preferably at or about 380 degrees F. and the introduction of steam into the bath in which the wood is 'directly treated renders it practically impossible to maintain the desired temperature.

It is therefore the object of this invention improve the means for extracting the turentine and other more or less volatile subitances in such a way as to permit the deiired temperature to be maintained in the )ath while the wood is being acted upon, tnd at the same time to permit the separation )f the turpentine and other substances from he bath to be facilitated by the use of team, the operation of the method progressng meanwhile continuously and without in.- erruption.

In accordance with the invention the osin bath is circulated continuously, is ieated as it approaches the point at which it cts upon-the wood, and at a remote point, fter it has become charged with the turpen inc and other substances, is subjected to the ction of steam which agitatesv and cools the mac, the vapors disengaged being immeditely conducted away and condensed.

Specification of Letters Patent.

Application filed December 30,1906. Serial No. 293,920.

pipes 7c,

provided The invention will be more'iully described Patented April 30, 1907.

hereinafter with reference to the accompanying drawing, which represents, partly in elevation and partly in section, and in a more or less conventional manner, an apparatus which embodies the invention.

The wood to be treated is placed in a suitsit able closed vessel c, which may be completely filled, suitable spaces being left for the pits sage of the bath throughout the mass o f wood. This vessel is provided with a suitable door, whichwhcn opened permits the vessel to be charged and which may be closed tightly. Otherwise, this vessel has no opening except for the admission and discharge of the bath. it being obvious however that as -many doors may be provided as desired for expeditiously inserting and removing the wood provided said doors may be tightly closed. J

A second vessel 0, independent of the vessela, is adapted to receive the bath, being provided, if desirable, with a fire-box (Z or other suitable means to assist in raising the tomtemperature of the bath to the desired peraturc before commencing, the circulation of the bath, and with the usual dome c and WOIIID, partly indicated at of an ordinary stil a pipe g, between the lower portion of t vessel 0 and the vessel a, such pipe being provided with a pump it to maintainthe circulation of the bath, a heater i by which the bath can be reheated and brought to the desired temperature as it passes from the vessel 0 to the vessel a, and branchrs g and 9 provided with cocks g, g and g and communicating, at the top and bottom respectively of the tank or vessel c, with perforated distributing The branches 9, g are likewise connected with the vessel 0 by extensions 9 and g respectively,

vwith cocks g and g respectively. The provision of the branches 9, of the pipe 7, their extensions 9 and g and the sevoral cocks referred. to, is for the purpose, as. will be readily understood, of permitting the direction of movement of the bath through the vessel a to be reversed.

The vessel c is provided, in its lower portion, with a perforated steam distributing pipe '1, through which steam can be admitted to the bath as it lies in the vessel 0 for the purpose of facilitating the separation of the turpentine and. other substances.

In the operation of the apparatus shown in the drawing, the vessel (1 is filled with Communication is established, through such extensions being wood, suitablydivided to permit of the permeation of the'bath throughout the mass and the vessel 0 is partly filled with melted rosin, the temperature thereof being maintained by suitable means. By the pump it the bath is transferred from the vessel 6 to the vessel a,

whichit fills completely and from which it returns to the vessel 0. If the cocks 9 g and g areopened and the other cocks are closed, the heated rosin will enter the vessel 0,

' through the pipe 7c and will be returned to-the vessel 0 through the pipe is and the pipeg; While if the cocks g, g and g be opened and the other cocks closed the heated rosin will enter the tank a through the pipe 7c and will be returned to the vessel 0 through the pipe is and the branch 9 In its passage from the vessel 0 to the vessel a the bath is reheated by the heater i to the temperature which is -.best suited for action upon the wood: As

the meltedrosin or other material, charged with the turpentine or other more or less volatile substances extracted from the Wood,

passes through the vessel 0, in which it lies in it is subjected to the ac suitable quantity, tionof the steam from the pipes Z which agitates and cools the bath and the separation.

of, the turpentine and other volatile substances is facilitated, the vapors passing ofi throu h the dome and worm and being con dense% in the-usual manner. It will be ob'-' served, however, that the temperature of the :bath in the vessel (1 is not aifected by the introductionof steam in the vessel 0, the temperature of the bath, which is lowered in the vessel 0' bythe' intr odu'ction of steam being restored in the passage of the bath to the vessel a, by the heater i. I

It will be understood that the details of seaase construction and arrangement of the apparatus can be varied from whatis shown 1D.

the drawing without departing from the spirit of the invention. I

I claim as my invention:

1. An apparatus for the extraction of turpentine, etc., from wood, comprising a closed vessel for the reception of the wood tobe treated provided with inlets and outlets at the top and bottom for the bath and combined products, a vessel for the ed, means forcirculating the bath between the two vessels, means for introducing steam into the bath in the second'named vessel, means for condensing the vapors from the second named vessel, and means for reheating the bath on its return from the second named vessel'to the first named vessel.

2. An apparatus for the extraction of turpentine, etc. from wood, comprising a vessel for the reception of the 'wood to be treated, provided with inlets and outlets at the to and bottom for the bath and combined'pro ucts, a vessel-for the reception of a portion of the bath with which the wood is to be treated, means for circulating a portion of the bath between the two vessels, means for introducing steam into the portion of the bath in the second named vessel to remove .the extracted products, and means for condensing all the vapors fromthe second named vessel, substantially as described? This specification signed and witnessed this 29th dayof December A. D., 1905. s MALCOLM.MOKENZIE.

Signed in the presence of- THOMAS J. CANTY, W. B. GREELEY.

reception of the bath with which the Wood is to be treat- 

